Frequencies for first 10,000 rows of specr variable in namcs2007 dataset :

      physician specialty |
       recode (15 groups) |      Freq.     Percent        Cum.
--------------------------+-----------------------------------
  general/family practice |      4,907       49.07       49.07
        internal medicine |      1,878       18.78       67.85
               pediatrics |      2,127       21.27       89.12
          general surgery |         30        0.30       89.42
obstetrics and gynecology |         89        0.89       90.31
       orthopedic surgery |         93        0.93       91.24
  cardiovascular diseases |         35        0.35       91.59
              dermatology |         69        0.69       92.28
               psychiatry |        108        1.08       93.36
                neurology |         81        0.81       94.17
            ophthalmology |         71        0.71       94.88
        other specialties |        512        5.12      100.00
--------------------------+-----------------------------------
                    Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016